Analog Devices Announces 60 VOUT Synchronous Boost LED Driver

Features:
• Synchronous Controller for Highest Efficiency
• 500 µA Maximum Quiescent Current and 1 µA Shutdown Current (TA = 25°C)
• Optional Spread Spectrum Frequency Modulation for Low EMI
• Internal 250:1 PWM Signal Generator

The LT3762’s 2.5 V to 38.5 V input voltage range and synchronous operation is ideal for automotive power systems, portable instruments, industrial applications, medical instruments and architectural lighting. An auxiliary on-chip buck-boost converter provides the necessary gate drive voltage in low voltage systems, and when combined with a low 500 µA maximum quiescent current and 1 µA shutdown current (TA = 25°C), results in high efficiency over wide input voltage and output current ranges.

In systems where EMI is a concern, the LT3762’s optional spread spectrum frequency modulation can be enabled to reduce the effective switching frequency noise. An on-chip PWM signal generator is synchronized to the internal oscillator for lowest noise performance. Internal PWM generation provides 250:1 dimming; external 3000:1 dimming or analog dimming can also be employed.

Other features of the constant current and constant voltage LT3762 include current mode operation with cycle-by-cycle current limiting, adjustable 100 kHz to 1 MHz switching, programmable undervoltage lockout, open LED and short-circuit protection with fault status indicators, LED overcurrent protection and thermal shutdown.

The LT3762 is available in thermally enhanced 28-lead TSSOP and 4x5 mm QFN packages. Three temperature grades are available, with operation from –40°C to 125°C (junction) for the extended and industrial grades, and a high temperature grade of –40°C to 150°C.

For more information, to download data sheet, order samples and evaluation boards, please visit the LT3762 product page www.analog.com/LT3762